In neovim, how can I share registers between editor instances?

Question

I know that vim had the client/server divide that allowed register sharing between different vim clients, but how do you achieve the same thing in neovim? It doesn't support the client/server flags. I saw this question, but my goal is specifically sharing registers, not imitating the rest of client/server. Is something like neovim remote the only way, or is there something simpler I can do?

Answer 1

LEI is right; and the neovim help instructions give this as a specific use case for that feature:

Two commands can be used to read and write the ShaDa file manually. This can be used to exchange registers between two running Vim programs: First type ":wsh" in one and then ":rsh" in the other.

Answer 2

No idea about the clientserver feature, the simplest way I can think of would be to use the system clipboard by default when yanking or pasting which can be done with:

set clipboard=unnamedplus

Depending on your OS and environment, you might need other tweaks for it to work seamlessly.

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Also, you may be able to leverage the viminfo file (or :h shada on neovim):

The ShaDa file is used to store:

• The command line history.
• The search string history.
• The input-line history.
• Contents of non-empty registers.
• Marks for several files.
• File marks, pointing to locations in files.
• Last search/substitute pattern (for 'n' and '&').
• The buffer list.
• Global variables.

Answer 3

use tmux，tmux buffer to unname register, uname register to tmux buffer

https://github.com/tracyone/t-vim/blob/master/autoload/te/tmux.vim

Answer 4

Sorry, because I dont know anymore where I found this:

" share data between nvim instances (registers etc)
augroup SHADA
    autocmd!
    autocmd CursorHold,TextYankPost,FocusGained,FocusLost *
                \ if exists(':rshada') | rshada | wshada | endif
augroup END